Apparent molar volume, isentropic compressibilities, viscosity B-coefficients and activation parameters of thiamine hydrochloride in aqueous solutions of saccharides at different temperatures

Volumetric and UV–Visible Spectroscopic Evaluation of Interactions between Thiamine Hydrochloride and Protic Ionic Liquids in Aqueous Solutions

“…We have used the Masson equation for the determination of infinite dilution partial molar volume and partial molar isentropic compressibility of Th.HCl in water and in aqueous PIL solutions. For Th.HCl, being an ionic solute (electrolyte), simple Masson as well as Redlich–Meyer type of equations have been used for the determination of infinite dilution values. ,,, In this study, the infinite dilution partial molar volume of Th.HCl determined from fitting of data to Masson equation agree well with the literature values. ,,, Moreover, regarding the effect of hydrolysis of the electrolyte (dissociation), the volumetric properties considered in dilute acidic solution (HCl) indicated that in case of Th.HCl the effect of hydrolysis was negligible. , The V 2 ° values in aqueous PIL solutions decrease as chain length of anions of PIL increases and increase with increasing temperatures. The increase in V 2 ° values may be due to hydrophilic-ionic interactions between the solute and cosolute in water.…”

“…Utilizing the Newton–Laplace equation and solution compressibility, κ s was obtained as κ s = c –2 ρ –1 . The comparison of density and speed of sound data of Th.HCl in water with the literature data are shown in Supporting Information, Figures S1 and S2. ,, The ρ and c data was used for calculating the apparent molar volumes and apparent isentropic compressibility for various binary/ternary solutions as V 2 , ϕ = [ M / ρ ] − [ false( ρ − ρ o false) / false( m ρ ρ o false) ] K s , 2 , ϕ = ( κ normals M / ρ ) − [ false( κ s ° ρ − κ s ρ o false) / false( m ρ ρ o false) ] here V 2,ϕ , M , m , ρ, and ρ o represents apparent molar volume, solute molar mass, solute molality in solution (binary or ternary), density of solution, and density of solvent (Th.HCl + H 2 O + PILs or PILs + H 2 O), respectively. In eq , κ s , κ s °, and K s,2,ϕ represents isentropic compressibility of the solutions, isentropic compressibility of pure solvent, and apparent molar isentropic compressibility of binary/ternary solutions, respectively.…”

“…Apparent molar volumes and partial molar volumes become equal at an infinite dilution. Treating Th.HCl as electrolyte, V 2 ° was determined using Masson equation as , V 2 , ϕ = V 2 ° + S v m here S v is the experimental slope indicating solute–solute interactions. The V 2 ° values determined for Th.HCl increase with molalities, m B of cosolute (PILs), and also with temperatures, as given in Table .…”

Thermophysical Studies on Molecular Interactions of Semicarbazide Hydrochloride/Domiphen Bromide in Aqueous Deep Eutectic Solvent Media at Various Temperatures

“…In other words, the H 2 O surrounding the drug molecules in the primary/secondary hydration layers loosens and migrates toward the interior of the solution with the temperature increase, thereby leading to an expansion in the volume of the mixture. Furthermore, the enhancement in V ϕ with an increase in maline concentrations is caused due to the dehydration effect of maline over hydrated drug molecules . Still, for a better perception of intermolecular interactions, the limiting apparent molar volumes were assessed.…”

A Comprehensive Study on Molecular Interactions of l-Ascorbic Acid/Nicotinic Acid in Aqueous [BMIm]Br at Varying Temperatures and Compositions: Spectroscopic and Thermodynamic Insights

“…For all the solutions, apparent molar volume, V ϕ , has been deliberated through the use of eq where m is the concentration in molality (mol kg –1 ), M is the molar mass (kg mol –1 ) of the solute, ρ and ρ o are the densities (kg m –3 ) of solution and pure solvent, respectively. The estimation of uncertainty in apparent molar volume, δV ϕ , has been done through the utilization of the following equation where δρ is the uncertainty in the density of solution. The partial molar volumes for the vitamins in different solvent media have been calculated by making use of the Masson equation, which is presented below where V ϕ 0 is the partial molar volume and S V is the Debye–Huckel limiting slope, and its value varies with temperature and valency factor.…”